Abstract: A mycological composite material is made by inoculating a substrate of fibrous material with an inoculum of mycelial tissue; rolling the inoculated substrate into a roll; and thereafter incubating the rolled inoculated substrate for a time sufficient for the mycelial tissue to grow hyphae that enmesh with the substrate to form a cohesive unified filamentous network with the rolled inoculated substrate being characterized in being flexible. The rolled inoculated substrate is subsequently processed by subjecting lengths of the roll to heat and pressure in molds to form rigid products.